alpha-modifier: add support for protocol

src/protocols/AlphaModifier.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <memory>
+#include <vector>
+#include <unordered_map>
+#include "WaylandProtocol.hpp"
+#include "alpha-modifier-v1.hpp"
+
+class CAlphaModifier {
+  public:
+    CAlphaModifier(SP<CWpAlphaModifierSurfaceV1> resource_, wlr_surface* surface);
+    ~CAlphaModifier();
+
+    bool         good();
+    wlr_surface* getSurface();
+    void         onSurfaceDestroy();
+
+  private:
+    SP<CWpAlphaModifierSurfaceV1> resource;
+    wlr_surface*                  pSurface = nullptr;
+
+    void setSurfaceAlpha(float a);
+
+    DYNLISTENER(surfaceDestroy);
+};
+
+class CAlphaModifierProtocol : public IWaylandProtocol {
+  public:
+    CAlphaModifierProtocol(const wl_interface* iface, const int& ver, const std::string& name);
+
+    virtual void bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id);
+
+  private:
+    void onManagerResourceDestroy(wl_resource* res);
+    void destroyModifier(CAlphaModifier* decoration);
+    void onGetSurface(CWpAlphaModifierV1* pMgr, uint32_t id, wlr_surface* surface);
+
+    //
+    std::vector<UP<CWpAlphaModifierV1>>                  m_vManagers;
+    std::unordered_map<wlr_surface*, UP<CAlphaModifier>> m_mAlphaModifiers; // xdg_toplevel -> deco
+
+    friend class CAlphaModifier;
+};
+
+namespace PROTO {
+    inline UP<CAlphaModifierProtocol> alphaModifier;
+};